For women: stressful aspects between the "feminine" planets and Saturn

For men: stressful aspects between the "masculine" planets and Saturn

Strong Neptune aspects with any of the personal planets

and others involving Pluto, the 8th House, the 12th House, etc.

As
you might guess, even these few factors leave plenty of room for error
and misinterpretation. So far, none of the statistical research has
provided a clear-cut astrological answer to the gay or straight
question.